--- rat/lonsequence.pm	2019/02/06 23:45:14	1.48.2.1
+++ rat/lonsequence.pm	2020/09/03 12:44:56	1.53
@@ -2,7 +2,7 @@
 #
 # Sequence Handler
 #
-# $Id: lonsequence.pm,v 1.48.2.1 2019/02/06 23:45:14 raeburn Exp $
+# $Id: lonsequence.pm,v 1.53 2020/09/03 12:44:56 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,6 +36,7 @@ use Apache::lonnet;
 use Apache::Constants qw(:common :http REDIRECT);
 use GDBM_File;
 use LONCAPA::map();
+use LONCAPA::ltiutils;
 use LONCAPA;
 use Apache::lonpageflip();
 use Apache::loncommon();
@@ -260,20 +261,32 @@ sub handler {
            if (ref($navmap)) {
                # renderer call
                if (&Apache::lonnet::is_on_map($requrl)) {
-                   @crumbs = ({text  => $crstype.' Contents',
-                               href  => "javascript:gopost('/adm/navmaps','')"});
-                   my $res = $navmap->getResourceByUrl($mapurl);
-                   if (ref($res)) {
-                       my $symb = $res->symb();
-                       if ($symb) {
-                           my ($parent) = &Apache::lonnet::decode_symb($res->symb());
-                           if ($parent ne $env{'course.'.$env{'request.course.id'}.'.url'}) {
-                               my @mapcrumbs = $navmap->recursed_crumbs($parent);
-                               if (@mapcrumbs) {
-                                   push(@crumbs,@mapcrumbs);
+                   my ($ltiscope,$ltiuri);
+                   if (($env{'request.lti.login'}) && ($env{'request.lti.uri'})) {
+                       my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                       my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                       ($ltiscope,$ltiuri) = &LONCAPA::ltiutils::lti_provider_scope($env{'request.lti.uri'},$cdom,$cnum);
+                   }
+                   @crumbs = ();
+                   unless ($ltiscope eq 'resource') {
+                       unless ($ltiscope eq 'map') {
+                           @crumbs = ({text  => $crstype.' Contents',
+                                       href  => "javascript:gopost('/adm/navmaps','')"});
+                       }
+                       my $res = $navmap->getResourceByUrl($mapurl);
+                       if (ref($res)) {
+                           my $symb = $res->symb();
+                           if ($symb) {
+                               my ($parent) = &Apache::lonnet::decode_symb($res->symb());
+                               if (($parent ne $env{'course.'.$env{'request.course.id'}.'.url'}) &&
+                                   !(($ltiscope eq 'map') && ($requrl eq $ltiuri))) {
+                                   my @mapcrumbs = $navmap->recursed_crumbs($parent);
+                                   if (@mapcrumbs) {
+                                       push(@crumbs,@mapcrumbs);
+                                   }
                                }
+                               $env{'request.symb'} = $symb;
                            }
-                           $env{'request.symb'} = $symb;
                        }
                    }
                    push(@crumbs,{text => $maptitle, no_mt => 1});
@@ -404,8 +417,12 @@ sub handler {
       if ($is_encrypted) {
           $showdisurl = &Apache::lonenc::encrypted($disurl);
       }
-      &Apache::lonnet::symblist($requrl,$disurl => [$disurl,$dismapid],
-				'last_known' => [$disurl,$dismapid]); 
+      if ($disurl =~ m{^/adm/navmaps(\?|$)}) {
+          &Apache::lonnet::symblist($requrl,$disurl => [$disurl,$dismapid]);
+      } else {
+          &Apache::lonnet::symblist($requrl,$disurl => [$disurl,$dismapid],
+                                    'last_known' => [$disurl,$dismapid]);
+      }
       &Apache::loncommon::content_type($r,'text/html');
       $r->header_out(Location => &Apache::lonnet::absolute_url($ENV{'SERVER_NAME'}).
                                  $showdisurl);